Typewriting machine



Aug. 21, 1945. J. J. KITTEL TYPEWRITING MACHINE OriginalFled July 3Q1943 WQ ww QN, @n N W www ww N m.. www mu mw a @Y f Y, n fm SQ Nw .wm RW,Tm l u ,www V ,xvmm 3 www mK.. m H mm f a Nw mJ m M VN. .1. mwN Q MQQMM JA w ww NN 0MM/M #SW www S\ www am www wfg @www5 Y n z vv A. o Mv/ll .n...... .w Ww uw M m mm ...V :1.I1ll I... w M @66N .E Y w v /I m. MN@s Nv N. mn uw ./f 1- NJW QM. NW NN \.QW QN .am .wm @Y .mwmvvhu wwwKfourmi) lSTATI-:s Pii'rlezlvr-v OFFICE TYPEWRITING MACHINE Jaim JosephKittel, st. Albans, N. Y., assigner to Royal Typewriter Companyg Inc.,New York,

V N. Y., a corporation of New York Original application July 3, 1943,Serial No. 493,450. Divided and this application March 4, 1944,SeriaiNo. 525.060

2 Claims. (Cl. IS7-107) This invention relates to typewriting or likemachines, and more particularly to means for preventing operation ofmechanism `for actuating a type bar or other printing member whenassociated `mechanismV for actuating a companion type bar or printingmember is in operation.

This application is a`division ofmy copendlng application SerlalNumber493,450, led July 3,

Other objects will become apparent from a' reading of the followingdetailed description, the appended claims, and the accompanying drawingin which:

Figure 1 is a fragmentary vertical, fore and aft section of a typewritermechanism embodying the invention;

Figure 2 is a fragmentary detail elevation of a safety lock mechanismembodying the invention drawn on an enlarged scale; and

Figure 3 is a fragmentaryhorizontal section on the line 3-3 of Figure 1.

The invention is capable of being embodied in typewriting machines ofvarious kinds. For the purposes of illustration it is shown inconnection with a typewriter the general construction and arrangement ofmany of the parts of which conform to the well known Royal Standardtypewriter construction.

The typewriter illustrated comprises a main frame A on which a. carriageB equipped with a platen C is mounted for letter spacing and returnmovements.

When'the machine is conditioned for opera.- tion, the carriage B isurged to move in the letter spacing direction under the control of anescapement mechanism unit generally designated D. 'Ihe escapementmechanism comprises a fixed frame 6 which pivotally mounts a rocker 1carrying a fixed dog 8 and a pivoted dog 9 cooperable in the usualmanner with an escapement wheel I0. 'Ihe Wheel I0 is connected through apawl Ito a pinion Il normally in mesh with an escapement rack I2 mountedon the carriage.

A universal frame I3 includesfarms one of which is shown at I4 pivotedat I5 on a frame mounted bracket I6. The universal frame is u rgedrearwardly by a spring l1 and includes a universal bar I8 adapted to bepulled forwardly upon the depression of one of the usual key levers orthe space bar. Adjustably mounted on the frame I3 is a pressure plate I9adapted to push against a roller 20 journaled at the lower end of aspring arm 2| carried by the rocker 1. When the frame I3 is rockedclockwise as viewed in Figure l, the plate I9 pushes the roller 20 so asto rock the rocker 1 and operate the escapement mechanism D to effect asingle letter spacing movement of the carriage in the usual manner. Theusual space bar (not shown) having the arms 2lb is connected by a link 2I*s to the universal frame i 3. The escapement rack l2 is mounted on abail 2.2 which is pivoted as at 23 on the carriage end plates one ofwhich is shown at 24. Springs (not shown) respectively interposedbetween the carriage end plates and rearwardly extending arms integralwith the bail 22 normally hold the rack l2 down in engagement with theescapement pinion Il. For permitting tabulating movements of thecarriage B, the bail 22 and the rack l2 are rocked clockwise as viewedin Figure 1 by a tabulating rack lift lever pivoted on the main frameand being formed with an ear 30 engageable with the bail 22 in the usualmanner.

The travel of the carriage in letter spacing and return directions islimited respectively by margin stops mounted on a. margin stop bar 318and being cooperable with a center stop 39. The right hand margin stopis `shown at 36 in Figure 1. `Then the carriage approaches the end ofits travel to the left in the letter spacing direction, the margin stop36 operates a, line lock lever 40 so that when the carriage is broughtto rest by the center stop 39 the key levers cannot be operated. Theline lock lever 40 is pivoted as at 4I on the 'center stop 39 and isformed with a. downwardly extending arm 42, the lower end of which isconnected by a link 43 to one ann 44 of a lever 45 pivoted as at 46 'onframe brackets 41. A spring 48 interposed between the lever arm 44 and aframe mounted ear 49 biases or urges the lever 45 and line lock lever 40to non- Y line locking position, movement of the parts under the urge ofthe spring 48 being limited by engagement of a. stop projection 50 onthe lever 45 with the frame A. Another arm 44a of the lever 45 isconnected by a link 5I to a key lever blocking device, which in the formshown 'comprises a line lock plate 52 pivoted as at 53.

'I'he usual case shift member, in the lform shown a type bar segment E,is mounted for vertical shifting on the frame A and is equipped with apivot Wire 54 which mounts the usual complement of type bar members, oneof which is shown at 55. Each type member 55 is formed with a short arm56 connected by a link 5,1 to an intermediate lever 58 pivoted as at 59on the key lever bracket 60 carried by the frame A. The bracket 60 alsomountsthe key levers 6| which are pivoted on a fulcrum shaft 62 and areurged upwardly against a stop 63 by returning springs 64. Each keydevice 6| is connected by a link 65 to a front lever 66 pivoted as at'61on the frame A. The type bars 55 normally and when in inactive positionare supported at their free ends by a head rest 68.

In the conventional Royal Standard construction, as for example theconstruction shown `in they patent to Henry J. Hart, No. 2,202,451,granted May 28, 1940, each of the front levers corresponding to thelever 66 shown in Figure 1 is connected by a link to an associatedintermediate lever corresponding to the lever 58 shown in Figure 1 sothat upon depression of a key lever, manually applied force istransmitted to the type bar for moving it to printing position. Theinvention claimed herein may be embodied either in typewriters in whichmanually applied force is relied upon for actuating the type bars, or intypewriters in which depression of a key lever controls the action ofpower means which appliesv the actual force for moving the type bars toprinting position. In the illustrative embodiment depression of a keylever is utilized to disable a restraining device so as' to permit poweroperable means to apply the elort for moving the associated type bar.

It will be understood that a key lever 6|, the type'bar 55 andassociated parts shown in the drawings are representative of each oftheplurality of type bar actions and associated key mechanism although onlyone complete type bar action is shown. The description of one completetype bar action is-intended to serve as a description of the other typebar actions,

The carriage B may be urged in the letter spacing direction by anysuitable means, for example by the usual spring barrel motor or bymechanism disclosed in the parent application Serial Number 493,450referred to above, and disclosed and claimed in the co-pendingdivisional application Serial Number 525,058, filed March 4, 1944. Inthis mechanism a gear, a portion of which is shown at |06, constantlyurges a carriagedrive rack |08 to move the carriage in the letterspacing direction. The carriage is connected to a cam shaft |69 bygearing not shown herein but fully disclosed in the copendingapplications referred to. 'I'he arrangement is suchthat for each letterspacing movement of the carriage the cam shaft |69 turns through oneeighth of a complete revolution.

The mechanism' for operating and for controlling the operation of thetype bars 55 is claimed in the parent application Serial Number 493,450and is similar in some respects to mechanism disclosed in the copendingapplication of JohnJ. Kittel, Serial No. 493,449, led July 3, 1943.Depressing of a key lever 6| is not made effective for applying manuallyexerted force for moving the type bar 55 on its printing stroke, but isutilized for releasing Vthe restraint on a spring 19 connected betweenthe intermediate lever 58 and an adjusting plate |51 pivoted as frombeing rocked by the spring 19. In order to at |58 on the frame A. Whenreleased, the spring 19 contracts and rocks the lever 58counterclockwise, thereby swinging the type bar to printing position.

Depending from a curved slot |59 in the leve 58 is a. link |60 pivotedat its lower end to a. cam

follower lever' |6|`in turn pivoted as at |62 on` |64 of a releasablebar lock keeper |65 pivotedV as at |66; 'I'he roller |63 also isreleasably restrained against upward movement by the crest of one of theeight lobes |61 on a resettingmember comprising a cam |68 secured to theshaft |69. Normally the cam |68 is positioned with the crest of a lobe|61 directly above the roller |63. Thus, both the bar lock keeper |65and the cam |68 normally prevent rising of the roller |63 and thereforenormally restrain the lever 58 discontinue the restraint of both thekeeper |65 and the resetting member |68 and permit the spring 19 tocontract and drive the type bar to printing position it is necessary todisplace the restraining face |64 of the keeper |65 from above theroller |63 and also to rotate the cam |68 so as to allow the roller tomove into the depression between two cam lobes |61.

The bar lock keeper |65 is adapted to be rocked upon depression of theassociated key 6| for displacing the restraining face |64 from above theroller |63. For thisI purposean arm |18 on the keeper |65 is connectedby a link |18 to the key operated lever 66. Thus, upon depression of thekey 6|, the link 65 will rock the lever 66 clockwise to pull on the link|18a and rock the keeper |65 counterclockwise thereby mming the keeperface |64 away from the roller |63.

Thereafter, to enable the spring 19 to actuate the lever 58, link 51 andtype lbar 55, the cam |68 is rotated one-eighth of a revolution. Whilethe depression between the lobe |61 last positioned above the roller |63and the next adjacent lobe is presented above the roller the lever |6|is free to rock clockwise. Hence the spring 19 contracts and rocks -theintermediate lever 58 counterclockwise unrestrained by the link |60 andlever |6|, and the link 51 is pulled forwardly to swing the type bar 55to printing position, as shown in Figure 1.

The force of the type [bar printing impact may be varied by turning anadjusting screw |19 carried by the adjusting plate |51 and having itsend engaging a xed part of the frame A. If the screw |19 is'turned torock the adjusting plate |51 clockwise as viewed in Figure 1, thesprings 19 associated with the respective type |bars will be subjectedto additional tension so as to be capable of swinging the type bars 55into printing position with more force. Adjustment of the tension of thesprings 19 is accompanied by a variation in the force required todepress the key levers 6|y thus requiring a heavier touch to effectoperation of a type bar. additional tensioning' of the springs 19 causestherollers |63 to be held against the keepers |65 with greater force,thereby requiring additional manually applied effort for moving thekeepers |65 from engagement with the rollers For operating theescapement mechanism D in response to the depression of a key lever 6|,a supplemental universal bar is pivoted. at |66 and is engaged byprojections|8| formed respec- This is because tively -on the bar keepers|65. An arm |82 on the supplemental universal bar |80 is connected tothe escapement frame I3 by a pull rod |83 having its rear end hooked at|84 to embrace the rod I8 on the universal frame I3. Thus, when a keylever 8| is depressed, the associated keeper |85 is swungcounterclockwise to the position shown in Figure 1thereby rocking thesupplemental universal bar `|80 counterclockwise and swinging theuniversal frame I3 clockwise to actuate the escapement mechanism. Whenthe key lever is released, the springs I1 and 64 will contract torestore the parts to their positions.

Normally each type bar actuating .spring 19 is restrained by engagementof the associated roller |83 with a lobe |81 and with the associatedkeeper restraining face |84. When a key lever 8| is depressed, theassociated keeper |65 is swung to the position shown in Figure 1,thereby rocking the supplemental universal bar |80 and operating the'escapement mechanism D in the manner previously described. When thecarriage moves in response to operation of the escapement mechanism thecam shaft |89 is rotated as explained above. As the cam lobe |61 whichwas in contact with the roller |83 prior to operation of the key lever8| moves from above the roller |83, a cam depression willbe presentedabove the roller |83 and the roller will be enabled to rise so as topermit the spring 19 to move the 'type bar 55 to printing position, theretreating cam lobe piloting the type par to typing position. The typebarwill reach printing position when the cam shaft has moved throughone-sixteenth of a revolution, the parts then being positioned as shownin Figure 1. During the next one-sixteenth of a revolution of the camshaft |89, the next or following cam lobe |81 will engage the roller |83so as to move the ann |8| downwardly, thereby restoring the type bar 85to its position of rest, reloading the spring 19, and enabling therestraining face |84 of the .keeper |85 to move over the roller |83. Theparts will then have been returned to their normal positions and theescapement mechanism D will have arrested the carriage and theV camshaft |89.

As shown in Figure 1, the shape and size of the cam |88, the mounting ofthe type member 55, and the connections between the roller |83 andthetype member 55 are so interrelated that the roller |83 is out ofcontact with the cam |88 when the type member 55 reaches typingposition. Thus the cam |88 is effective for restrainling or piloting thetype member during part of the typing stroke but not during the lastpart of the stroke. Consequently the adjustment of the spring 19 can beeffective for varying the force of the type impact.

shape with the leg 332 normally extending diagonally across the paths ofthe abutment heels 333. When the key lever is depressed the abutmentheel 333 engages the operating part 332 and rocks the blocking part 52rearwardly from its normal forwardly offset position to the positionshown in full lines in Figure 2. The line lock plate 52 will then bedisposed directly under the toes 335 of the aligned key lever abutments334 so as to prevent operative downward movement of the other keylevers. This operation of the safety lock does not disturb the line locklever 40 because the link 5| interposedl'between the line lock plate 52and the line lock lever 40 has its frontend connected to the line lockplate 52 by a one way drive connection including a part 336 of the link5| and a slot 331 in the line 4lock plate. Thus rearwardfmovement of thelink position but rearward movement of the line locking plate caused bydepression of a key lever 8| i will not move the linkv 5|.

comprisingthe parts 52 and 332 is generally of V l The mechanismdescribedwith reference to the drawings embodies the invention in theform now preferred, but it is evident that changes may be made withoutdeparting from the invention as defined in the claims.

I claim:

1. In a typewriter orlike machine, a plurality of type members; meansincluding a plurality of key levers associated respectively with saidtype members for effecting selective operation of said type members;aligned abutments on said key levers, each including a heel and a toespaced horizontally from said heel and at substantially the same leveltherewith; a blocking device; and means 'pivoting said device to rockabout an axis parallel to the direction of alignment of said abutments,said device comprising a blocking part positioned out of the paths ofsaid abutment toes when said device is in normal position and anoperating part formed integrally with the blocking-part and normallybeing disposed in the paths of said abutment heels and being engageableby the abutment heels on an operated key lever for rocking said deviceto position said blocking part thereof in the paths of the otherabutment toes.

2. In a typewriter or like machine, a plurality of type members; meansincluding a plurality of key levers associated respectively with saidtype members for effecting selective operation of said type members;aligned abutments on said key levers respectively, each including a heeland a toe spaced horizontally from said heel and at substantially thesame level therewith; a. blocking device; and means pivoting saidabutment to rock about an axis parallel to the direction of alignment ofsaid abutments, said device being generally V shaped in cross sectionand including a blocking leg normally disposed laterally offset from the-paths of said abutment toes'and an operating leg, formed integrallywith the blocking leg and extending diagonally across the paths of saidabutment heels and being engageable by the abutment heel of any operatedkey lever for rocking said device to position said blockingleg in thepaths of the abutment toes.

on the other key levers.

